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1239141-70-8

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1239141-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1239141-70-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,9,1,4 and 1 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1239141-70:
(9*1)+(8*2)+(7*3)+(6*9)+(5*1)+(4*4)+(3*1)+(2*7)+(1*0)=138
138 % 10 = 8
So 1239141-70-8 is a valid CAS Registry Number.

1239141-70-8Relevant articles and documents

A simple, safe and efficient synthesis of Tyrian purple (6,6'-Dibromoindigo)

Wolk, Joel L.,Frimer, Aryeh A.

experimental part, p. 5561 - 5580 (2010/12/20)

6,6'-Dibromoindigo is a major component of the historic pigment Tyrian purple, arguably the most famous dye of antiquity. Over the last century, chemists have been interested in developing practical syntheses of the compound We describe herein a new, reasonably simple and efficient synthesis of Tyrian purple which opens the way to the production of large quantities of the dye with minimal hazards and at low cost.

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